Branch data Line data Source code
1 : : /*
2 : : * UPnP WPS Device
3 : : * Copyright (c) 2000-2003 Intel Corporation
4 : : * Copyright (c) 2006-2007 Sony Corporation
5 : : * Copyright (c) 2008-2009 Atheros Communications
6 : : * Copyright (c) 2009-2010, Jouni Malinen <j@w1.fi>
7 : : *
8 : : * See below for more details on licensing and code history.
9 : : */
10 : :
11 : : /*
12 : : * This has been greatly stripped down from the original file
13 : : * (upnp_wps_device.c) by Ted Merrill, Atheros Communications
14 : : * in order to eliminate use of the bulky libupnp library etc.
15 : : *
16 : : * History:
17 : : * upnp_wps_device.c is/was a shim layer between wps_opt_upnp.c and
18 : : * the libupnp library.
19 : : * The layering (by Sony) was well done; only a very minor modification
20 : : * to API of upnp_wps_device.c was required.
21 : : * libupnp was found to be undesirable because:
22 : : * -- It consumed too much code and data space
23 : : * -- It uses multiple threads, making debugging more difficult
24 : : * and possibly reducing reliability.
25 : : * -- It uses static variables and only supports one instance.
26 : : * The shim and libupnp are here replaced by special code written
27 : : * specifically for the needs of hostapd.
28 : : * Various shortcuts can and are taken to keep the code size small.
29 : : * Generally, execution time is not as crucial.
30 : : *
31 : : * BUGS:
32 : : * -- UPnP requires that we be able to resolve domain names.
33 : : * While uncommon, if we have to do it then it will stall the entire
34 : : * hostapd program, which is bad.
35 : : * This is because we use the standard linux getaddrinfo() function
36 : : * which is syncronous.
37 : : * An asyncronous solution would be to use the free "ares" library.
38 : : * -- Does not have a robust output buffering scheme. Uses a single
39 : : * fixed size output buffer per TCP/HTTP connection, with possible (although
40 : : * unlikely) possibility of overflow and likely excessive use of RAM.
41 : : * A better solution would be to write the HTTP output as a buffered stream,
42 : : * using chunking: (handle header specially, then) generate data with
43 : : * a printf-like function into a buffer, catching buffer full condition,
44 : : * then send it out surrounded by http chunking.
45 : : * -- There is some code that could be separated out into the common
46 : : * library to be shared with wpa_supplicant.
47 : : * -- Needs renaming with module prefix to avoid polluting the debugger
48 : : * namespace and causing possible collisions with other static fncs
49 : : * and structure declarations when using the debugger.
50 : : * -- The http error code generation is pretty bogus, hopefully no one cares.
51 : : *
52 : : * Author: Ted Merrill, Atheros Communications, based upon earlier work
53 : : * as explained above and below.
54 : : *
55 : : * Copyright:
56 : : * Copyright 2008 Atheros Communications.
57 : : *
58 : : * The original header (of upnp_wps_device.c) reads:
59 : : *
60 : : * Copyright (c) 2006-2007 Sony Corporation. All Rights Reserved.
61 : : *
62 : : * File Name: upnp_wps_device.c
63 : : * Description: EAP-WPS UPnP device source
64 : : *
65 : : * Redistribution and use in source and binary forms, with or without
66 : : * modification, are permitted provided that the following conditions
67 : : * are met:
68 : : *
69 : : * * Redistributions of source code must retain the above copyright
70 : : * notice, this list of conditions and the following disclaimer.
71 : : * * Redistributions in binary form must reproduce the above copyright
72 : : * notice, this list of conditions and the following disclaimer in
73 : : * the documentation and/or other materials provided with the
74 : : * distribution.
75 : : * * Neither the name of Sony Corporation nor the names of its
76 : : * contributors may be used to endorse or promote products derived
77 : : * from this software without specific prior written permission.
78 : : *
79 : : * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
80 : : * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
81 : : * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
82 : : * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
83 : : * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
84 : : * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
85 : : * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
86 : : * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
87 : : * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
88 : : * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
89 : : * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
90 : : *
91 : : * Portions from Intel libupnp files, e.g. genlib/net/http/httpreadwrite.c
92 : : * typical header:
93 : : *
94 : : * Copyright (c) 2000-2003 Intel Corporation
95 : : * All rights reserved.
96 : : *
97 : : * Redistribution and use in source and binary forms, with or without
98 : : * modification, are permitted provided that the following conditions are met:
99 : : *
100 : : * * Redistributions of source code must retain the above copyright notice,
101 : : * this list of conditions and the following disclaimer.
102 : : * * Redistributions in binary form must reproduce the above copyright notice,
103 : : * this list of conditions and the following disclaimer in the documentation
104 : : * and/or other materials provided with the distribution.
105 : : * * Neither name of Intel Corporation nor the names of its contributors
106 : : * may be used to endorse or promote products derived from this software
107 : : * without specific prior written permission.
108 : : *
109 : : * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
110 : : * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
111 : : * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
112 : : * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL OR
113 : : * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
114 : : * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
115 : : * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
116 : : * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
117 : : * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
118 : : * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
119 : : * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
120 : : */
121 : :
122 : : /*
123 : : * Overview of WPS over UPnP:
124 : : *
125 : : * UPnP is a protocol that allows devices to discover each other and control
126 : : * each other. In UPnP terminology, a device is either a "device" (a server
127 : : * that provides information about itself and allows itself to be controlled)
128 : : * or a "control point" (a client that controls "devices") or possibly both.
129 : : * This file implements a UPnP "device".
130 : : *
131 : : * For us, we use mostly basic UPnP discovery, but the control part of interest
132 : : * is WPS carried via UPnP messages. There is quite a bit of basic UPnP
133 : : * discovery to do before we can get to WPS, however.
134 : : *
135 : : * UPnP discovery begins with "devices" send out multicast UDP packets to a
136 : : * certain fixed multicast IP address and port, and "control points" sending
137 : : * out other such UDP packets.
138 : : *
139 : : * The packets sent by devices are NOTIFY packets (not to be confused with TCP
140 : : * NOTIFY packets that are used later) and those sent by control points are
141 : : * M-SEARCH packets. These packets contain a simple HTTP style header. The
142 : : * packets are sent redundantly to get around packet loss. Devices respond to
143 : : * M-SEARCH packets with HTTP-like UDP packets containing HTTP/1.1 200 OK
144 : : * messages, which give similar information as the UDP NOTIFY packets.
145 : : *
146 : : * The above UDP packets advertise the (arbitrary) TCP ports that the
147 : : * respective parties will listen to. The control point can then do a HTTP
148 : : * SUBSCRIBE (something like an HTTP PUT) after which the device can do a
149 : : * separate HTTP NOTIFY (also like an HTTP PUT) to do event messaging.
150 : : *
151 : : * The control point will also do HTTP GET of the "device file" listed in the
152 : : * original UDP information from the device (see UPNP_WPS_DEVICE_XML_FILE
153 : : * data), and based on this will do additional GETs... HTTP POSTs are done to
154 : : * cause an action.
155 : : *
156 : : * Beyond some basic information in HTTP headers, additional information is in
157 : : * the HTTP bodies, in a format set by the SOAP and XML standards, a markup
158 : : * language related to HTML used for web pages. This language is intended to
159 : : * provide the ultimate in self-documentation by providing a universal
160 : : * namespace based on pseudo-URLs called URIs. Note that although a URI looks
161 : : * like a URL (a web address), they are never accessed as such but are used
162 : : * only as identifiers.
163 : : *
164 : : * The POST of a GetDeviceInfo gets information similar to what might be
165 : : * obtained from a probe request or response on Wi-Fi. WPS messages M1-M8
166 : : * are passed via a POST of a PutMessage; the M1-M8 WPS messages are converted
167 : : * to a bin64 ascii representation for encapsulation. When proxying messages,
168 : : * WLANEvent and PutWLANResponse are used.
169 : : *
170 : : * This of course glosses over a lot of details.
171 : : */
172 : :
173 : : #include "includes.h"
174 : :
175 : : #include <time.h>
176 : : #include <net/if.h>
177 : : #include <netdb.h>
178 : : #include <sys/ioctl.h>
179 : :
180 : : #include "common.h"
181 : : #include "uuid.h"
182 : : #include "base64.h"
183 : : #include "wps.h"
184 : : #include "wps_i.h"
185 : : #include "wps_upnp.h"
186 : : #include "wps_upnp_i.h"
187 : :
188 : :
189 : : /*
190 : : * UPnP allows a client ("control point") to send a server like us ("device")
191 : : * a domain name for registration, and we are supposed to resolve it. This is
192 : : * bad because, using the standard Linux library, we will stall the entire
193 : : * hostapd waiting for resolution.
194 : : *
195 : : * The "correct" solution would be to use an event driven library for domain
196 : : * name resolution such as "ares". However, this would increase code size
197 : : * further. Since it is unlikely that we'll actually see such domain names, we
198 : : * can just refuse to accept them.
199 : : */
200 : : #define NO_DOMAIN_NAME_RESOLUTION 1 /* 1 to allow only dotted ip addresses */
201 : :
202 : :
203 : : /*
204 : : * UPnP does not scale well. If we were in a room with thousands of control
205 : : * points then potentially we could be expected to handle subscriptions for
206 : : * each of them, which would exhaust our memory. So we must set a limit. In
207 : : * practice we are unlikely to see more than one or two.
208 : : */
209 : : #define MAX_SUBSCRIPTIONS 4 /* how many subscribing clients we handle */
210 : : #define MAX_ADDR_PER_SUBSCRIPTION 8
211 : :
212 : : /* Maximum number of Probe Request events per second */
213 : : #define MAX_EVENTS_PER_SEC 5
214 : :
215 : :
216 : : static struct upnp_wps_device_sm *shared_upnp_device = NULL;
217 : :
218 : :
219 : : /* Write the current date/time per RFC */
220 : 61 : void format_date(struct wpabuf *buf)
221 : : {
222 : 61 : const char *weekday_str = "Sun\0Mon\0Tue\0Wed\0Thu\0Fri\0Sat";
223 : 61 : const char *month_str = "Jan\0Feb\0Mar\0Apr\0May\0Jun\0"
224 : : "Jul\0Aug\0Sep\0Oct\0Nov\0Dec";
225 : : struct tm *date;
226 : : time_t t;
227 : :
228 : 61 : t = time(NULL);
229 : 61 : date = gmtime(&t);
230 : 61 : wpabuf_printf(buf, "%s, %02d %s %d %02d:%02d:%02d GMT",
231 : 61 : &weekday_str[date->tm_wday * 4], date->tm_mday,
232 : 122 : &month_str[date->tm_mon * 4], date->tm_year + 1900,
233 : : date->tm_hour, date->tm_min, date->tm_sec);
234 : 61 : }
235 : :
236 : :
237 : : /***************************************************************************
238 : : * UUIDs (unique identifiers)
239 : : *
240 : : * These are supposed to be unique in all the world.
241 : : * Sometimes permanent ones are used, sometimes temporary ones
242 : : * based on random numbers... there are different rules for valid content
243 : : * of different types.
244 : : * Each uuid is 16 bytes long.
245 : : **************************************************************************/
246 : :
247 : : /* uuid_make -- construct a random UUID
248 : : * The UPnP documents don't seem to offer any guidelines as to which method to
249 : : * use for constructing UUIDs for subscriptions. Presumably any method from
250 : : * rfc4122 is good enough; I've chosen random number method.
251 : : */
252 : 3 : static void uuid_make(u8 uuid[UUID_LEN])
253 : : {
254 : 3 : os_get_random(uuid, UUID_LEN);
255 : :
256 : : /* Replace certain bits as specified in rfc4122 or X.667 */
257 : 3 : uuid[6] &= 0x0f; uuid[6] |= (4 << 4); /* version 4 == random gen */
258 : 3 : uuid[8] &= 0x3f; uuid[8] |= 0x80;
259 : 3 : }
260 : :
261 : :
262 : : /*
263 : : * Subscriber address handling.
264 : : * Since a subscriber may have an arbitrary number of addresses, we have to
265 : : * add a bunch of code to handle them.
266 : : *
267 : : * Addresses are passed in text, and MAY be domain names instead of the (usual
268 : : * and expected) dotted IP addresses. Resolving domain names consumes a lot of
269 : : * resources. Worse, we are currently using the standard Linux getaddrinfo()
270 : : * which will block the entire program until complete or timeout! The proper
271 : : * solution would be to use the "ares" library or similar with more state
272 : : * machine steps etc. or just disable domain name resolution by setting
273 : : * NO_DOMAIN_NAME_RESOLUTION to 1 at top of this file.
274 : : */
275 : :
276 : : /* subscr_addr_delete -- delete single unlinked subscriber address
277 : : * (be sure to unlink first if need be)
278 : : */
279 : 3 : void subscr_addr_delete(struct subscr_addr *a)
280 : : {
281 : : /*
282 : : * Note: do NOT free domain_and_port or path because they point to
283 : : * memory within the allocation of "a".
284 : : */
285 : 3 : os_free(a);
286 : 3 : }
287 : :
288 : :
289 : : /* subscr_addr_free_all -- unlink and delete list of subscriber addresses. */
290 : 3 : static void subscr_addr_free_all(struct subscription *s)
291 : : {
292 : : struct subscr_addr *a, *tmp;
293 [ + + ]: 6 : dl_list_for_each_safe(a, tmp, &s->addr_list, struct subscr_addr, list)
294 : : {
295 : 3 : dl_list_del(&a->list);
296 : 3 : subscr_addr_delete(a);
297 : : }
298 : 3 : }
299 : :
300 : :
301 : : /* subscr_addr_add_url -- add address(es) for one url to subscription */
302 : 3 : static void subscr_addr_add_url(struct subscription *s, const char *url,
303 : : size_t url_len)
304 : : {
305 : : int alloc_len;
306 : 3 : char *scratch_mem = NULL;
307 : : char *mem;
308 : : char *host;
309 : : char *delim;
310 : : char *path;
311 : 3 : int port = 80; /* port to send to (default is port 80) */
312 : : struct addrinfo hints;
313 : 3 : struct addrinfo *result = NULL;
314 : : struct addrinfo *rp;
315 : : int rerr;
316 : : size_t host_len, path_len;
317 : :
318 : : /* url MUST begin with http: */
319 [ + - ][ + - ]: 3 : if (url_len < 7 || os_strncasecmp(url, "http://", 7))
320 : : goto fail;
321 : 3 : url += 7;
322 : 3 : url_len -= 7;
323 : :
324 : : /* Make a copy of the string to allow modification during parsing */
325 : 3 : scratch_mem = dup_binstr(url, url_len);
326 [ - + ]: 3 : if (scratch_mem == NULL)
327 : 0 : goto fail;
328 : 3 : wpa_printf(MSG_DEBUG, "WPS UPnP: Adding URL '%s'", scratch_mem);
329 : 3 : host = scratch_mem;
330 : 3 : path = os_strchr(host, '/');
331 [ + - ]: 3 : if (path)
332 : 3 : *path++ = '\0'; /* null terminate host */
333 : :
334 : : /* Process and remove optional port component */
335 : 3 : delim = os_strchr(host, ':');
336 [ + - ]: 3 : if (delim) {
337 : 3 : *delim = '\0'; /* null terminate host name for now */
338 [ + - ]: 3 : if (isdigit(delim[1]))
339 : 3 : port = atol(delim + 1);
340 : : }
341 : :
342 : : /*
343 : : * getaddrinfo does the right thing with dotted decimal notations, or
344 : : * will resolve domain names. Resolving domain names will unfortunately
345 : : * hang the entire program until it is resolved or it times out
346 : : * internal to getaddrinfo; fortunately we think that the use of actual
347 : : * domain names (vs. dotted decimal notations) should be uncommon.
348 : : */
349 : 3 : os_memset(&hints, 0, sizeof(struct addrinfo));
350 : 3 : hints.ai_family = AF_INET; /* IPv4 */
351 : 3 : hints.ai_socktype = SOCK_STREAM;
352 : : #if NO_DOMAIN_NAME_RESOLUTION
353 : : /* Suppress domain name resolutions that would halt
354 : : * the program for periods of time
355 : : */
356 : 3 : hints.ai_flags = AI_NUMERICHOST;
357 : : #else
358 : : /* Allow domain name resolution. */
359 : : hints.ai_flags = 0;
360 : : #endif
361 : 3 : hints.ai_protocol = 0; /* Any protocol? */
362 : 3 : rerr = getaddrinfo(host, NULL /* fill in port ourselves */,
363 : : &hints, &result);
364 [ - + ]: 3 : if (rerr) {
365 : 0 : wpa_printf(MSG_INFO, "WPS UPnP: Resolve error %d (%s) on: %s",
366 : : rerr, gai_strerror(rerr), host);
367 : 0 : goto fail;
368 : : }
369 : :
370 [ + - ]: 3 : if (delim)
371 : 3 : *delim = ':'; /* Restore port */
372 : :
373 : 3 : host_len = os_strlen(host);
374 [ + - ]: 3 : path_len = path ? os_strlen(path) : 0;
375 : 3 : alloc_len = host_len + 1 + 1 + path_len + 1;
376 : :
377 [ + + ]: 6 : for (rp = result; rp; rp = rp->ai_next) {
378 : : struct subscr_addr *a;
379 : :
380 : : /* Limit no. of address to avoid denial of service attack */
381 [ - + ]: 3 : if (dl_list_len(&s->addr_list) >= MAX_ADDR_PER_SUBSCRIPTION) {
382 : 0 : wpa_printf(MSG_INFO, "WPS UPnP: subscr_addr_add_url: "
383 : : "Ignoring excessive addresses");
384 : 0 : break;
385 : : }
386 : :
387 : 3 : a = os_zalloc(sizeof(*a) + alloc_len);
388 [ - + ]: 3 : if (a == NULL)
389 : 0 : break;
390 : 3 : mem = (char *) (a + 1);
391 : 3 : a->domain_and_port = mem;
392 : 3 : os_memcpy(mem, host, host_len);
393 : 3 : mem += host_len + 1;
394 : 3 : a->path = mem;
395 [ + - ][ + - ]: 3 : if (path == NULL || path[0] != '/')
396 : 3 : *mem++ = '/';
397 [ + - ]: 3 : if (path)
398 : 3 : os_memcpy(mem, path, path_len);
399 : 3 : os_memcpy(&a->saddr, rp->ai_addr, sizeof(a->saddr));
400 : 3 : a->saddr.sin_port = htons(port);
401 : :
402 : 3 : dl_list_add(&s->addr_list, &a->list);
403 : : }
404 : :
405 : : fail:
406 [ + - ]: 3 : if (result)
407 : 3 : freeaddrinfo(result);
408 : 3 : os_free(scratch_mem);
409 : 3 : }
410 : :
411 : :
412 : : /* subscr_addr_list_create -- create list from urls in string.
413 : : * Each url is enclosed by angle brackets.
414 : : */
415 : 3 : static void subscr_addr_list_create(struct subscription *s,
416 : : const char *url_list)
417 : : {
418 : : const char *end;
419 : 3 : wpa_printf(MSG_DEBUG, "WPS UPnP: Parsing URL list '%s'", url_list);
420 : : for (;;) {
421 [ - + ][ - + ]: 6 : while (*url_list == ' ' || *url_list == '\t')
422 : 0 : url_list++;
423 [ + + ]: 6 : if (*url_list != '<')
424 : 3 : break;
425 : 3 : url_list++;
426 : 3 : end = os_strchr(url_list, '>');
427 [ - + ]: 3 : if (end == NULL)
428 : 0 : break;
429 : 3 : subscr_addr_add_url(s, url_list, end - url_list);
430 : 3 : url_list = end + 1;
431 : 3 : }
432 : 3 : }
433 : :
434 : :
435 : 26 : static void wpabuf_put_property(struct wpabuf *buf, const char *name,
436 : : const char *value)
437 : : {
438 : 26 : wpabuf_put_str(buf, "<e:property>");
439 : 26 : wpabuf_printf(buf, "<%s>", name);
440 [ + - ]: 26 : if (value)
441 : 26 : wpabuf_put_str(buf, value);
442 : 26 : wpabuf_printf(buf, "</%s>", name);
443 : 26 : wpabuf_put_str(buf, "</e:property>\n");
444 : 26 : }
445 : :
446 : :
447 : : /**
448 : : * upnp_wps_device_send_event - Queue event messages for subscribers
449 : : * @sm: WPS UPnP state machine from upnp_wps_device_init()
450 : : *
451 : : * This function queues the last WLANEvent to be sent for all currently
452 : : * subscribed UPnP control points. sm->wlanevent must have been set with the
453 : : * encoded data before calling this function.
454 : : */
455 : 24 : static void upnp_wps_device_send_event(struct upnp_wps_device_sm *sm)
456 : : {
457 : : /* Enqueue event message for all subscribers */
458 : : struct wpabuf *buf; /* holds event message */
459 : 24 : int buf_size = 0;
460 : : struct subscription *s, *tmp;
461 : : /* Actually, utf-8 is the default, but it doesn't hurt to specify it */
462 : 24 : const char *format_head =
463 : : "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"
464 : : "<e:propertyset xmlns:e=\"urn:schemas-upnp-org:event-1-0\">\n";
465 : 24 : const char *format_tail = "</e:propertyset>\n";
466 : : struct os_reltime now;
467 : :
468 [ + + ]: 24 : if (dl_list_empty(&sm->subscriptions)) {
469 : : /* optimize */
470 : 7 : return;
471 : : }
472 : :
473 [ + - ]: 17 : if (os_get_reltime(&now) == 0) {
474 [ + + ]: 17 : if (now.sec != sm->last_event_sec) {
475 : 9 : sm->last_event_sec = now.sec;
476 : 9 : sm->num_events_in_sec = 1;
477 : : } else {
478 : 8 : sm->num_events_in_sec++;
479 : : /*
480 : : * In theory, this should apply to all WLANEvent
481 : : * notifications, but EAP messages are of much higher
482 : : * priority and Probe Request notifications should not
483 : : * be allowed to drop EAP messages, so only throttle
484 : : * Probe Request notifications.
485 : : */
486 [ - + ][ # # ]: 8 : if (sm->num_events_in_sec > MAX_EVENTS_PER_SEC &&
487 : 0 : sm->wlanevent_type ==
488 : : UPNP_WPS_WLANEVENT_TYPE_PROBE) {
489 : 0 : wpa_printf(MSG_DEBUG, "WPS UPnP: Throttle "
490 : : "event notifications (%u seen "
491 : : "during one second)",
492 : : sm->num_events_in_sec);
493 : 0 : return;
494 : : }
495 : : }
496 : : }
497 : :
498 : : /* Determine buffer size needed first */
499 : 17 : buf_size += os_strlen(format_head);
500 : 17 : buf_size += 50 + 2 * os_strlen("WLANEvent");
501 [ + - ]: 17 : if (sm->wlanevent)
502 : 17 : buf_size += os_strlen(sm->wlanevent);
503 : 17 : buf_size += os_strlen(format_tail);
504 : :
505 : 17 : buf = wpabuf_alloc(buf_size);
506 [ - + ]: 17 : if (buf == NULL)
507 : 0 : return;
508 : 17 : wpabuf_put_str(buf, format_head);
509 : 17 : wpabuf_put_property(buf, "WLANEvent", sm->wlanevent);
510 : 17 : wpabuf_put_str(buf, format_tail);
511 : :
512 : 17 : wpa_printf(MSG_MSGDUMP, "WPS UPnP: WLANEvent message:\n%s",
513 : 17 : (char *) wpabuf_head(buf));
514 : :
515 [ + + ]: 34 : dl_list_for_each_safe(s, tmp, &sm->subscriptions, struct subscription,
516 : : list) {
517 : 17 : event_add(s, buf,
518 : 17 : sm->wlanevent_type == UPNP_WPS_WLANEVENT_TYPE_PROBE);
519 : : }
520 : :
521 : 24 : wpabuf_free(buf);
522 : : }
523 : :
524 : :
525 : : /*
526 : : * Event subscription (subscriber machines register with us to receive event
527 : : * messages).
528 : : * This is the result of an incoming HTTP over TCP SUBSCRIBE request.
529 : : */
530 : :
531 : : /* subscription_destroy -- destroy an unlinked subscription
532 : : * Be sure to unlink first if necessary.
533 : : */
534 : 3 : void subscription_destroy(struct subscription *s)
535 : : {
536 : : struct upnp_wps_device_interface *iface;
537 : 3 : wpa_printf(MSG_DEBUG, "WPS UPnP: Destroy subscription %p", s);
538 : 3 : subscr_addr_free_all(s);
539 : 3 : event_delete_all(s);
540 [ + + ]: 6 : dl_list_for_each(iface, &s->sm->interfaces,
541 : : struct upnp_wps_device_interface, list)
542 : 3 : upnp_er_remove_notification(iface->wps->registrar, s);
543 : 3 : os_free(s);
544 : 3 : }
545 : :
546 : :
547 : : /* subscription_list_age -- remove expired subscriptions */
548 : 3 : static void subscription_list_age(struct upnp_wps_device_sm *sm, time_t now)
549 : : {
550 : : struct subscription *s, *tmp;
551 [ - + ]: 3 : dl_list_for_each_safe(s, tmp, &sm->subscriptions,
552 : : struct subscription, list) {
553 [ # # ]: 0 : if (s->timeout_time > now)
554 : 0 : break;
555 : 0 : wpa_printf(MSG_DEBUG, "WPS UPnP: Removing aged subscription");
556 : 0 : dl_list_del(&s->list);
557 : 0 : subscription_destroy(s);
558 : : }
559 : 3 : }
560 : :
561 : :
562 : : /* subscription_find -- return existing subscription matching uuid, if any
563 : : * returns NULL if not found
564 : : */
565 : 1 : struct subscription * subscription_find(struct upnp_wps_device_sm *sm,
566 : : const u8 uuid[UUID_LEN])
567 : : {
568 : : struct subscription *s;
569 [ + - ]: 1 : dl_list_for_each(s, &sm->subscriptions, struct subscription, list) {
570 [ + - ]: 1 : if (os_memcmp(s->uuid, uuid, UUID_LEN) == 0)
571 : 1 : return s; /* Found match */
572 : : }
573 : 1 : return NULL;
574 : : }
575 : :
576 : :
577 : 1 : static struct wpabuf * build_fake_wsc_ack(void)
578 : : {
579 : 1 : struct wpabuf *msg = wpabuf_alloc(100);
580 [ - + ]: 1 : if (msg == NULL)
581 : 0 : return NULL;
582 : 1 : wpabuf_put_u8(msg, UPNP_WPS_WLANEVENT_TYPE_EAP);
583 : 1 : wpabuf_put_str(msg, "00:00:00:00:00:00");
584 [ + - - + ]: 2 : if (wps_build_version(msg) ||
585 : 1 : wps_build_msg_type(msg, WPS_WSC_ACK)) {
586 : 0 : wpabuf_free(msg);
587 : 0 : return NULL;
588 : : }
589 : : /* Enrollee Nonce */
590 : 1 : wpabuf_put_be16(msg, ATTR_ENROLLEE_NONCE);
591 : 1 : wpabuf_put_be16(msg, WPS_NONCE_LEN);
592 : 1 : wpabuf_put(msg, WPS_NONCE_LEN);
593 : : /* Registrar Nonce */
594 : 1 : wpabuf_put_be16(msg, ATTR_REGISTRAR_NONCE);
595 : 1 : wpabuf_put_be16(msg, WPS_NONCE_LEN);
596 : 1 : wpabuf_put(msg, WPS_NONCE_LEN);
597 : 1 : wps_build_wfa_ext(msg, 0, NULL, 0);
598 : 1 : return msg;
599 : : }
600 : :
601 : :
602 : : /* subscription_first_event -- send format/queue event that is automatically
603 : : * sent on a new subscription.
604 : : */
605 : 3 : static int subscription_first_event(struct subscription *s)
606 : : {
607 : : /*
608 : : * Actually, utf-8 is the default, but it doesn't hurt to specify it.
609 : : *
610 : : * APStatus is apparently a bit set,
611 : : * 0x1 = configuration change (but is always set?)
612 : : * 0x10 = ap is locked
613 : : *
614 : : * Per UPnP spec, we send out the last value of each variable, even
615 : : * for WLANEvent, whatever it was.
616 : : */
617 : : char *wlan_event;
618 : : struct wpabuf *buf;
619 : 3 : int ap_status = 1; /* TODO: add 0x10 if access point is locked */
620 : 3 : const char *head =
621 : : "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"
622 : : "<e:propertyset xmlns:e=\"urn:schemas-upnp-org:event-1-0\">\n";
623 : 3 : const char *tail = "</e:propertyset>\n";
624 : : char txt[10];
625 : : int ret;
626 : :
627 [ + + ]: 3 : if (s->sm->wlanevent == NULL) {
628 : : /*
629 : : * There has been no events before the subscription. However,
630 : : * UPnP device architecture specification requires all the
631 : : * evented variables to be included, so generate a dummy event
632 : : * for this particular case using a WSC_ACK and all-zeros
633 : : * nonces. The ER (UPnP control point) will ignore this, but at
634 : : * least it will learn that WLANEvent variable will be used in
635 : : * event notifications in the future.
636 : : */
637 : : struct wpabuf *msg;
638 : 1 : wpa_printf(MSG_DEBUG, "WPS UPnP: Use a fake WSC_ACK as the "
639 : : "initial WLANEvent");
640 : 1 : msg = build_fake_wsc_ack();
641 [ + - ]: 1 : if (msg) {
642 : 2 : s->sm->wlanevent = (char *)
643 : 1 : base64_encode(wpabuf_head(msg),
644 : : wpabuf_len(msg), NULL);
645 : 1 : wpabuf_free(msg);
646 : : }
647 : : }
648 : :
649 : 3 : wlan_event = s->sm->wlanevent;
650 [ + - ][ - + ]: 3 : if (wlan_event == NULL || *wlan_event == '\0') {
651 : 0 : wpa_printf(MSG_DEBUG, "WPS UPnP: WLANEvent not known for "
652 : : "initial event message");
653 : 0 : wlan_event = "";
654 : : }
655 : 3 : buf = wpabuf_alloc(500 + os_strlen(wlan_event));
656 [ - + ]: 3 : if (buf == NULL)
657 : 0 : return -1;
658 : :
659 : 3 : wpabuf_put_str(buf, head);
660 : 3 : wpabuf_put_property(buf, "STAStatus", "1");
661 : 3 : os_snprintf(txt, sizeof(txt), "%d", ap_status);
662 : 3 : wpabuf_put_property(buf, "APStatus", txt);
663 [ + - ]: 3 : if (*wlan_event)
664 : 3 : wpabuf_put_property(buf, "WLANEvent", wlan_event);
665 : 3 : wpabuf_put_str(buf, tail);
666 : :
667 : 3 : ret = event_add(s, buf, 0);
668 [ - + ]: 3 : if (ret) {
669 : 0 : wpabuf_free(buf);
670 : 0 : return ret;
671 : : }
672 : 3 : wpabuf_free(buf);
673 : :
674 : 3 : return 0;
675 : : }
676 : :
677 : :
678 : : /**
679 : : * subscription_start - Remember a UPnP control point to send events to.
680 : : * @sm: WPS UPnP state machine from upnp_wps_device_init()
681 : : * @callback_urls: Callback URLs
682 : : * Returns: %NULL on error, or pointer to new subscription structure.
683 : : */
684 : 3 : struct subscription * subscription_start(struct upnp_wps_device_sm *sm,
685 : : const char *callback_urls)
686 : : {
687 : : struct subscription *s;
688 : 3 : time_t now = time(NULL);
689 : 3 : time_t expire = now + UPNP_SUBSCRIBE_SEC;
690 : :
691 : : /* Get rid of expired subscriptions so we have room */
692 : 3 : subscription_list_age(sm, now);
693 : :
694 : : /* If too many subscriptions, remove oldest */
695 [ - + ]: 3 : if (dl_list_len(&sm->subscriptions) >= MAX_SUBSCRIPTIONS) {
696 [ # # ]: 0 : s = dl_list_first(&sm->subscriptions, struct subscription,
697 : : list);
698 : 0 : wpa_printf(MSG_INFO, "WPS UPnP: Too many subscriptions, "
699 : : "trashing oldest");
700 : 0 : dl_list_del(&s->list);
701 : 0 : subscription_destroy(s);
702 : : }
703 : :
704 : 3 : s = os_zalloc(sizeof(*s));
705 [ - + ]: 3 : if (s == NULL)
706 : 0 : return NULL;
707 : 3 : dl_list_init(&s->addr_list);
708 : 3 : dl_list_init(&s->event_queue);
709 : :
710 : 3 : s->sm = sm;
711 : 3 : s->timeout_time = expire;
712 : 3 : uuid_make(s->uuid);
713 : 3 : subscr_addr_list_create(s, callback_urls);
714 [ - + ]: 3 : if (dl_list_empty(&s->addr_list)) {
715 : 0 : wpa_printf(MSG_DEBUG, "WPS UPnP: No valid callback URLs in "
716 : : "'%s' - drop subscription", callback_urls);
717 : 0 : subscription_destroy(s);
718 : 0 : return NULL;
719 : : }
720 : :
721 : : /* Add to end of list, since it has the highest expiration time */
722 : 3 : dl_list_add_tail(&sm->subscriptions, &s->list);
723 : : /* Queue up immediate event message (our last event)
724 : : * as required by UPnP spec.
725 : : */
726 [ - + ]: 3 : if (subscription_first_event(s)) {
727 : 0 : wpa_printf(MSG_INFO, "WPS UPnP: Dropping subscriber due to "
728 : : "event backlog");
729 : 0 : dl_list_del(&s->list);
730 : 0 : subscription_destroy(s);
731 : 0 : return NULL;
732 : : }
733 : 3 : wpa_printf(MSG_DEBUG, "WPS UPnP: Subscription %p started with %s",
734 : : s, callback_urls);
735 : : /* Schedule sending this */
736 : 3 : event_send_all_later(sm);
737 : 3 : return s;
738 : : }
739 : :
740 : :
741 : : /* subscription_renew -- find subscription and reset timeout */
742 : 0 : struct subscription * subscription_renew(struct upnp_wps_device_sm *sm,
743 : : const u8 uuid[UUID_LEN])
744 : : {
745 : 0 : time_t now = time(NULL);
746 : 0 : time_t expire = now + UPNP_SUBSCRIBE_SEC;
747 : 0 : struct subscription *s = subscription_find(sm, uuid);
748 [ # # ]: 0 : if (s == NULL)
749 : 0 : return NULL;
750 : 0 : wpa_printf(MSG_DEBUG, "WPS UPnP: Subscription renewed");
751 : 0 : dl_list_del(&s->list);
752 : 0 : s->timeout_time = expire;
753 : : /* add back to end of list, since it now has highest expiry */
754 : 0 : dl_list_add_tail(&sm->subscriptions, &s->list);
755 : 0 : return s;
756 : : }
757 : :
758 : :
759 : : /**
760 : : * upnp_wps_device_send_wlan_event - Event notification
761 : : * @sm: WPS UPnP state machine from upnp_wps_device_init()
762 : : * @from_mac_addr: Source (Enrollee) MAC address for the event
763 : : * @ev_type: Event type
764 : : * @msg: Event data
765 : : * Returns: 0 on success, -1 on failure
766 : : *
767 : : * Tell external Registrars (UPnP control points) that something happened. In
768 : : * particular, events include WPS messages from clients that are proxied to
769 : : * external Registrars.
770 : : */
771 : 99 : int upnp_wps_device_send_wlan_event(struct upnp_wps_device_sm *sm,
772 : : const u8 from_mac_addr[ETH_ALEN],
773 : : enum upnp_wps_wlanevent_type ev_type,
774 : : const struct wpabuf *msg)
775 : : {
776 : 99 : int ret = -1;
777 : : char type[2];
778 : 99 : const u8 *mac = from_mac_addr;
779 : : char mac_text[18];
780 : 99 : u8 *raw = NULL;
781 : : size_t raw_len;
782 : : char *val;
783 : : size_t val_len;
784 : 99 : int pos = 0;
785 : :
786 [ + + ]: 99 : if (!sm)
787 : 75 : goto fail;
788 : :
789 : 24 : os_snprintf(type, sizeof(type), "%1u", ev_type);
790 : :
791 [ + - ]: 24 : raw_len = 1 + 17 + (msg ? wpabuf_len(msg) : 0);
792 : 24 : raw = os_zalloc(raw_len);
793 [ - + ]: 24 : if (!raw)
794 : 0 : goto fail;
795 : :
796 : 24 : *(raw + pos) = (u8) ev_type;
797 : 24 : pos += 1;
798 : 24 : os_snprintf(mac_text, sizeof(mac_text), MACSTR, MAC2STR(mac));
799 : 24 : wpa_printf(MSG_DEBUG, "WPS UPnP: Proxying WLANEvent from %s",
800 : : mac_text);
801 : 24 : os_memcpy(raw + pos, mac_text, 17);
802 : 24 : pos += 17;
803 [ + - ]: 24 : if (msg) {
804 : 24 : os_memcpy(raw + pos, wpabuf_head(msg), wpabuf_len(msg));
805 : 24 : pos += wpabuf_len(msg);
806 : : }
807 : 24 : raw_len = pos;
808 : :
809 : 24 : val = (char *) base64_encode(raw, raw_len, &val_len);
810 [ - + ]: 24 : if (val == NULL)
811 : 0 : goto fail;
812 : :
813 : 24 : os_free(sm->wlanevent);
814 : 24 : sm->wlanevent = val;
815 : 24 : sm->wlanevent_type = ev_type;
816 : 24 : upnp_wps_device_send_event(sm);
817 : :
818 : 24 : ret = 0;
819 : :
820 : : fail:
821 : 99 : os_free(raw);
822 : :
823 : 99 : return ret;
824 : : }
825 : :
826 : :
827 : : #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
828 : : #include <sys/sysctl.h>
829 : : #include <net/route.h>
830 : : #include <net/if_dl.h>
831 : :
832 : : static int eth_get(const char *device, u8 ea[ETH_ALEN])
833 : : {
834 : : struct if_msghdr *ifm;
835 : : struct sockaddr_dl *sdl;
836 : : u_char *p, *buf;
837 : : size_t len;
838 : : int mib[] = { CTL_NET, AF_ROUTE, 0, AF_LINK, NET_RT_IFLIST, 0 };
839 : :
840 : : if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0)
841 : : return -1;
842 : : if ((buf = os_malloc(len)) == NULL)
843 : : return -1;
844 : : if (sysctl(mib, 6, buf, &len, NULL, 0) < 0) {
845 : : os_free(buf);
846 : : return -1;
847 : : }
848 : : for (p = buf; p < buf + len; p += ifm->ifm_msglen) {
849 : : ifm = (struct if_msghdr *)p;
850 : : sdl = (struct sockaddr_dl *)(ifm + 1);
851 : : if (ifm->ifm_type != RTM_IFINFO ||
852 : : (ifm->ifm_addrs & RTA_IFP) == 0)
853 : : continue;
854 : : if (sdl->sdl_family != AF_LINK || sdl->sdl_nlen == 0 ||
855 : : os_memcmp(sdl->sdl_data, device, sdl->sdl_nlen) != 0)
856 : : continue;
857 : : os_memcpy(ea, LLADDR(sdl), sdl->sdl_alen);
858 : : break;
859 : : }
860 : : os_free(buf);
861 : :
862 : : if (p >= buf + len) {
863 : : errno = ESRCH;
864 : : return -1;
865 : : }
866 : : return 0;
867 : : }
868 : : #endif /* __FreeBSD__ */
869 : :
870 : :
871 : : /**
872 : : * get_netif_info - Get hw and IP addresses for network device
873 : : * @net_if: Selected network interface name
874 : : * @ip_addr: Buffer for returning IP address in network byte order
875 : : * @ip_addr_text: Buffer for returning a pointer to allocated IP address text
876 : : * @mac: Buffer for returning MAC address
877 : : * Returns: 0 on success, -1 on failure
878 : : */
879 : 4 : int get_netif_info(const char *net_if, unsigned *ip_addr, char **ip_addr_text,
880 : : u8 mac[ETH_ALEN])
881 : : {
882 : : struct ifreq req;
883 : 4 : int sock = -1;
884 : : struct sockaddr_in *addr;
885 : : struct in_addr in_addr;
886 : :
887 : 4 : *ip_addr_text = os_zalloc(16);
888 [ - + ]: 4 : if (*ip_addr_text == NULL)
889 : 0 : goto fail;
890 : :
891 : 4 : sock = socket(AF_INET, SOCK_DGRAM, 0);
892 [ - + ]: 4 : if (sock < 0)
893 : 0 : goto fail;
894 : :
895 : 4 : os_strlcpy(req.ifr_name, net_if, sizeof(req.ifr_name));
896 [ - + ]: 4 : if (ioctl(sock, SIOCGIFADDR, &req) < 0) {
897 : 0 : wpa_printf(MSG_ERROR, "WPS UPnP: SIOCGIFADDR failed: %d (%s)",
898 : 0 : errno, strerror(errno));
899 : 0 : goto fail;
900 : : }
901 : 4 : addr = (void *) &req.ifr_addr;
902 : 4 : *ip_addr = addr->sin_addr.s_addr;
903 : 4 : in_addr.s_addr = *ip_addr;
904 : 4 : os_snprintf(*ip_addr_text, 16, "%s", inet_ntoa(in_addr));
905 : :
906 : : #ifdef __linux__
907 : 4 : os_strlcpy(req.ifr_name, net_if, sizeof(req.ifr_name));
908 [ - + ]: 4 : if (ioctl(sock, SIOCGIFHWADDR, &req) < 0) {
909 : 0 : wpa_printf(MSG_ERROR, "WPS UPnP: SIOCGIFHWADDR failed: "
910 : 0 : "%d (%s)", errno, strerror(errno));
911 : 0 : goto fail;
912 : : }
913 : 4 : os_memcpy(mac, req.ifr_addr.sa_data, 6);
914 : : #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
915 : : if (eth_get(net_if, mac) < 0) {
916 : : wpa_printf(MSG_ERROR, "WPS UPnP: Failed to get MAC address");
917 : : goto fail;
918 : : }
919 : : #else
920 : : #error MAC address fetch not implemented
921 : : #endif
922 : :
923 : 4 : close(sock);
924 : 4 : return 0;
925 : :
926 : : fail:
927 [ # # ]: 0 : if (sock >= 0)
928 : 0 : close(sock);
929 : 0 : os_free(*ip_addr_text);
930 : 0 : *ip_addr_text = NULL;
931 : 4 : return -1;
932 : : }
933 : :
934 : :
935 : 4 : static void upnp_wps_free_msearchreply(struct dl_list *head)
936 : : {
937 : : struct advertisement_state_machine *a, *tmp;
938 [ - + ]: 4 : dl_list_for_each_safe(a, tmp, head, struct advertisement_state_machine,
939 : : list)
940 : 0 : msearchreply_state_machine_stop(a);
941 : 4 : }
942 : :
943 : :
944 : 4 : static void upnp_wps_free_subscriptions(struct dl_list *head,
945 : : struct wps_registrar *reg)
946 : : {
947 : : struct subscription *s, *tmp;
948 [ + + ]: 6 : dl_list_for_each_safe(s, tmp, head, struct subscription, list) {
949 [ - + ][ # # ]: 2 : if (reg && s->reg != reg)
950 : 0 : continue;
951 : 2 : dl_list_del(&s->list);
952 : 2 : subscription_destroy(s);
953 : : }
954 : 4 : }
955 : :
956 : :
957 : : /**
958 : : * upnp_wps_device_stop - Stop WPS UPnP operations on an interface
959 : : * @sm: WPS UPnP state machine from upnp_wps_device_init()
960 : : */
961 : 4 : static void upnp_wps_device_stop(struct upnp_wps_device_sm *sm)
962 : : {
963 [ + - ][ - + ]: 4 : if (!sm || !sm->started)
964 : 4 : return;
965 : :
966 : 4 : wpa_printf(MSG_DEBUG, "WPS UPnP: Stop device");
967 : 4 : web_listener_stop(sm);
968 : 4 : ssdp_listener_stop(sm);
969 : 4 : upnp_wps_free_msearchreply(&sm->msearch_replies);
970 : 4 : upnp_wps_free_subscriptions(&sm->subscriptions, NULL);
971 : :
972 : 4 : advertisement_state_machine_stop(sm, 1);
973 : :
974 : 4 : event_send_stop_all(sm);
975 : 4 : os_free(sm->wlanevent);
976 : 4 : sm->wlanevent = NULL;
977 : 4 : os_free(sm->ip_addr_text);
978 : 4 : sm->ip_addr_text = NULL;
979 [ + - ]: 4 : if (sm->multicast_sd >= 0)
980 : 4 : close(sm->multicast_sd);
981 : 4 : sm->multicast_sd = -1;
982 : :
983 : 4 : sm->started = 0;
984 : : }
985 : :
986 : :
987 : : /**
988 : : * upnp_wps_device_start - Start WPS UPnP operations on an interface
989 : : * @sm: WPS UPnP state machine from upnp_wps_device_init()
990 : : * @net_if: Selected network interface name
991 : : * Returns: 0 on success, -1 on failure
992 : : */
993 : 4 : static int upnp_wps_device_start(struct upnp_wps_device_sm *sm, char *net_if)
994 : : {
995 [ + - ][ - + ]: 4 : if (!sm || !net_if)
996 : 0 : return -1;
997 : :
998 [ - + ]: 4 : if (sm->started)
999 : 0 : upnp_wps_device_stop(sm);
1000 : :
1001 : 4 : sm->multicast_sd = -1;
1002 : 4 : sm->ssdp_sd = -1;
1003 : 4 : sm->started = 1;
1004 : 4 : sm->advertise_count = 0;
1005 : :
1006 : : /* Fix up linux multicast handling */
1007 [ - + ]: 4 : if (add_ssdp_network(net_if))
1008 : 0 : goto fail;
1009 : :
1010 : : /* Determine which IP and mac address we're using */
1011 [ - + ]: 4 : if (get_netif_info(net_if, &sm->ip_addr, &sm->ip_addr_text,
1012 : 4 : sm->mac_addr)) {
1013 : 0 : wpa_printf(MSG_INFO, "WPS UPnP: Could not get IP/MAC address "
1014 : : "for %s. Does it have IP address?", net_if);
1015 : 0 : goto fail;
1016 : : }
1017 : :
1018 : : /* Listen for incoming TCP connections so that others
1019 : : * can fetch our "xml files" from us.
1020 : : */
1021 [ - + ]: 4 : if (web_listener_start(sm))
1022 : 0 : goto fail;
1023 : :
1024 : : /* Set up for receiving discovery (UDP) packets */
1025 [ - + ]: 4 : if (ssdp_listener_start(sm))
1026 : 0 : goto fail;
1027 : :
1028 : : /* Set up for sending multicast */
1029 [ - + ]: 4 : if (ssdp_open_multicast(sm) < 0)
1030 : 0 : goto fail;
1031 : :
1032 : : /*
1033 : : * Broadcast NOTIFY messages to let the world know we exist.
1034 : : * This is done via a state machine since the messages should not be
1035 : : * all sent out at once.
1036 : : */
1037 [ - + ]: 4 : if (advertisement_state_machine_start(sm))
1038 : 0 : goto fail;
1039 : :
1040 : 4 : return 0;
1041 : :
1042 : : fail:
1043 : 0 : upnp_wps_device_stop(sm);
1044 : 4 : return -1;
1045 : : }
1046 : :
1047 : :
1048 : : static struct upnp_wps_device_interface *
1049 : 4 : upnp_wps_get_iface(struct upnp_wps_device_sm *sm, void *priv)
1050 : : {
1051 : : struct upnp_wps_device_interface *iface;
1052 [ + - ]: 4 : dl_list_for_each(iface, &sm->interfaces,
1053 : : struct upnp_wps_device_interface, list) {
1054 [ + - ]: 4 : if (iface->priv == priv)
1055 : 4 : return iface;
1056 : : }
1057 : 4 : return NULL;
1058 : : }
1059 : :
1060 : :
1061 : : /**
1062 : : * upnp_wps_device_deinit - Deinitialize WPS UPnP
1063 : : * @sm: WPS UPnP state machine from upnp_wps_device_init()
1064 : : * @priv: External context data that was used in upnp_wps_device_init() call
1065 : : */
1066 : 33 : void upnp_wps_device_deinit(struct upnp_wps_device_sm *sm, void *priv)
1067 : : {
1068 : : struct upnp_wps_device_interface *iface;
1069 : :
1070 [ + + ]: 33 : if (!sm)
1071 : 29 : return;
1072 : :
1073 : 4 : iface = upnp_wps_get_iface(sm, priv);
1074 [ - + ]: 4 : if (iface == NULL) {
1075 : 0 : wpa_printf(MSG_ERROR, "WPS UPnP: Could not find the interface "
1076 : : "instance to deinit");
1077 : 0 : return;
1078 : : }
1079 : 4 : wpa_printf(MSG_DEBUG, "WPS UPnP: Deinit interface instance %p", iface);
1080 [ + - ]: 4 : if (dl_list_len(&sm->interfaces) == 1) {
1081 : 4 : wpa_printf(MSG_DEBUG, "WPS UPnP: Deinitializing last instance "
1082 : : "- free global device instance");
1083 : 4 : upnp_wps_device_stop(sm);
1084 : : } else
1085 : 0 : upnp_wps_free_subscriptions(&sm->subscriptions,
1086 : 0 : iface->wps->registrar);
1087 : 4 : dl_list_del(&iface->list);
1088 : :
1089 [ + + ]: 4 : if (iface->peer.wps)
1090 : 3 : wps_deinit(iface->peer.wps);
1091 : 4 : os_free(iface->ctx->ap_pin);
1092 : 4 : os_free(iface->ctx);
1093 : 4 : os_free(iface);
1094 : :
1095 [ + - ]: 4 : if (dl_list_empty(&sm->interfaces)) {
1096 : 4 : os_free(sm->root_dir);
1097 : 4 : os_free(sm->desc_url);
1098 : 4 : os_free(sm);
1099 : 33 : shared_upnp_device = NULL;
1100 : : }
1101 : : }
1102 : :
1103 : :
1104 : : /**
1105 : : * upnp_wps_device_init - Initialize WPS UPnP
1106 : : * @ctx: callback table; we must eventually free it
1107 : : * @wps: Pointer to longterm WPS context
1108 : : * @priv: External context data that will be used in callbacks
1109 : : * @net_if: Selected network interface name
1110 : : * Returns: WPS UPnP state or %NULL on failure
1111 : : */
1112 : : struct upnp_wps_device_sm *
1113 : 4 : upnp_wps_device_init(struct upnp_wps_device_ctx *ctx, struct wps_context *wps,
1114 : : void *priv, char *net_if)
1115 : : {
1116 : : struct upnp_wps_device_sm *sm;
1117 : : struct upnp_wps_device_interface *iface;
1118 : 4 : int start = 0;
1119 : :
1120 : 4 : iface = os_zalloc(sizeof(*iface));
1121 [ - + ]: 4 : if (iface == NULL) {
1122 : 0 : os_free(ctx->ap_pin);
1123 : 0 : os_free(ctx);
1124 : 0 : return NULL;
1125 : : }
1126 : 4 : wpa_printf(MSG_DEBUG, "WPS UPnP: Init interface instance %p", iface);
1127 : :
1128 : 4 : iface->ctx = ctx;
1129 : 4 : iface->wps = wps;
1130 : 4 : iface->priv = priv;
1131 : :
1132 [ - + ]: 4 : if (shared_upnp_device) {
1133 : 0 : wpa_printf(MSG_DEBUG, "WPS UPnP: Share existing device "
1134 : : "context");
1135 : 0 : sm = shared_upnp_device;
1136 : : } else {
1137 : 4 : wpa_printf(MSG_DEBUG, "WPS UPnP: Initialize device context");
1138 : 4 : sm = os_zalloc(sizeof(*sm));
1139 [ - + ]: 4 : if (!sm) {
1140 : 0 : wpa_printf(MSG_ERROR, "WPS UPnP: upnp_wps_device_init "
1141 : : "failed");
1142 : 0 : os_free(iface);
1143 : 0 : os_free(ctx->ap_pin);
1144 : 0 : os_free(ctx);
1145 : 0 : return NULL;
1146 : : }
1147 : 4 : shared_upnp_device = sm;
1148 : :
1149 : 4 : dl_list_init(&sm->msearch_replies);
1150 : 4 : dl_list_init(&sm->subscriptions);
1151 : 4 : dl_list_init(&sm->interfaces);
1152 : 4 : start = 1;
1153 : : }
1154 : :
1155 : 4 : dl_list_add(&sm->interfaces, &iface->list);
1156 : :
1157 [ + - ][ - + ]: 4 : if (start && upnp_wps_device_start(sm, net_if)) {
1158 : 0 : upnp_wps_device_deinit(sm, priv);
1159 : 0 : return NULL;
1160 : : }
1161 : :
1162 : :
1163 : 4 : return sm;
1164 : : }
1165 : :
1166 : :
1167 : : /**
1168 : : * upnp_wps_subscribers - Check whether there are any event subscribers
1169 : : * @sm: WPS UPnP state machine from upnp_wps_device_init()
1170 : : * Returns: 0 if no subscribers, 1 if subscribers
1171 : : */
1172 : 4 : int upnp_wps_subscribers(struct upnp_wps_device_sm *sm)
1173 : : {
1174 : 4 : return !dl_list_empty(&sm->subscriptions);
1175 : : }
1176 : :
1177 : :
1178 : 2 : int upnp_wps_set_ap_pin(struct upnp_wps_device_sm *sm, const char *ap_pin)
1179 : : {
1180 : : struct upnp_wps_device_interface *iface;
1181 [ - + ]: 2 : if (sm == NULL)
1182 : 0 : return 0;
1183 : :
1184 [ + + ]: 4 : dl_list_for_each(iface, &sm->interfaces,
1185 : : struct upnp_wps_device_interface, list) {
1186 : 2 : os_free(iface->ctx->ap_pin);
1187 [ + + ]: 2 : if (ap_pin) {
1188 : 1 : iface->ctx->ap_pin = os_strdup(ap_pin);
1189 [ - + ]: 1 : if (iface->ctx->ap_pin == NULL)
1190 : 0 : return -1;
1191 : : } else
1192 : 1 : iface->ctx->ap_pin = NULL;
1193 : : }
1194 : :
1195 : 2 : return 0;
1196 : : }
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